Horns: Why don't they image well?

No idea. I’m only dropping in because, although I’ve heard horn designs here and there over the years, I wish I had more experience with them.  (My room set up has never favored horns, though).

Just for clarity: what exactly do you consider to constitute a horn design? Is it any speaker that uses some form of wave guide?

I felt the jbl Everest speakers were the best (or at least my favourite) at the last audio show I attended. Beautiful timbral reproduction of an orchestra, great dynamics, and I don’t seem to remember thinking the imaging sucked. But then again I’m not sure how much I was paying attention to that.

>>you seem new here<<

And you haven’t done your homework Skippy. 

Need big enough room, and enough space from the horns for the waves to disperse proper.

Bit late now, I already have them.lol.
Of course they can go ear bleeding loud if one desires, of which I do not do. My level is always  (mostly) a sedate listening level, after all don't want the kitties to do 'a runner' do we? 
How large a room would you say is adequate for the Klipschorns?
Anyone else think my room is not large enough?

Your room is on the very edge of what i would consider large enough.

My room is 15.5 x 26 and I have them on the short wall. Imaging is as good as speakers up to the 15k price point that have graced this room. Extremely happy!

Oz